I feel inferior to my friends and I can't help it

I'll start off simple, I come from a lower-middle class family. However, my friend group is full of all rich kids with rich and successful parents. My parents do provide me with all basic necessities and I don't have to worry about that, but ever since summer break started I've been feeling a little mentally down. I'm seeing all these people going on trips and I realized that we don't go anywhere, we didn't go last year or any year. The reason is simple. My parents cannot afford it. I've never been outside the city, never went out for too long, nothing. I'm not allowed socials and whenever I bring up such topics I get lectured. Ik they're trying hard but I just feel so mad whenever I realize we're broke.

I don't know what to do, I can't stop these feelings and they're genuinely ruining my summer break.